Boiler-furnace.



C.' A. MIDGLEY.

Boum PURNAGB.

APPLICATION FILED MAR. 22, 1912. I 1,036,299. Patented Aug. 20, 1912.

2 SHETS-SHEET 1.

rllllllllIlJ gy ZE uq l "1 n I C. A. MIDGLEY.

BOILBR FURNACE. APPLICATION MLBD MAR.22,191'2,

Patented Aug. 20, 19124 2 SHEETS-SHEET 2.

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'a Stege, beater. T

raw www Y NQ l il. wild rl BGLELEE,

To all' wlwm 2i may coffmern itlrnewii tba- Mmemn' i subject et? ille Britain arid e v fr b a.; the fel iiiiprmemeri r erected df im itien te existing bc be beiler Water eireulatieii, )erative effects, ami te at l terre pereture ef L initiation that resulte om y Neriing ber *e en an pulver met te q.. -fu-.A ilmeeese i l e,

l 1 t conditions ue l ma a l f f v f? er@ e i O illy ab. im e mees at 'es the eb- 11i-,aj Oi: mme@ :is beilelz4 By; crewne i bustieziiemoet naat if term ie rum heater' is ',cormectl l also eenneeterl by a i steam space of the Owing' te the iii rigjftimi, 11@ the :furnace i errar; in

f QCHESTER, y ENGLAN).

i912. Serial No. 6%",561.

lewe from the stage beater to the primary boiler. This rate of .iiow can be regulated at wiil by ixing a superlfieatecl steam jet in the rater pipes connected te the stage heater and also by fixing a valve in the'pipe e0nmeeting the steam spaces of the Stage heater and the primary boiler. Y In the' aeeompanying drawings illustratirig my invention and to which i hereinafter rie-tier; Figure l is a sectional elevation, Fig. '7 :Lplan ariel Fig. 3 an end elevation on line Y A' En these views the ysame letters refer `lili parte. l y My" izrventionI consists et' a specarllyzconstreef d combustion chamber `a that iS external *te the boiler and designed to emberly the essentials of my invention: this cfmy apparatus may be described asaeombinatien of combustion chamber inte which the niilverized fuel is fed with air, with a com )med cireulater and stage evaperater eeriisting 0i? a cylindrical drum' er supplementary small beller c which, by

preference, is eet in the crown of the combuetien Chamber e, and is there fed by water "'talfien freni the primary boiler by an educytier; pipe er .piges d that lead'ifremia point yor peints at or near the base of the primary lfioiler about midway from either end thereeit,V and Carrying the received Water thence te a rie'viee e at the base 0f the Cembuetien ,Chamber aelret for eeeling the nozzle fef thetwyer jf by which thefair and. pulverized fuel ijs fed in 'for eeiribiistien. Fremthe Water jacket eurrouneing the twyer npzzle f the lieatecl water is lecl away by a vpipe er pipes fl 0n- Warrl and upward te the eylindrical drum, Sub-beiler er evaporator c et the Supplementary stage .heater and cireulater, and. at seme convenient vpeint in its course is, by prefere-nce supplied with an injection jet netslxown) 0i superheatecl steam Qrquick- @ning or speeding up the eireulatien; and for placing the Same under control, -llrom the receiving drum c into wbiel'i the, quickenecl @errent is deliveretl' iter the stage heating', :rirtller cemmunieatienfis made 'With 'tbe pririary boiler by two istinet sets of eilarxien eliaruieis er eonduitsvg-and 011e el these sets g leal-ils from va peint or peints at er near tile base et' the rum c and delivers therefrom inte the primary ,eieeierigeeiiite arlgaeelt te the Vrefers, Patent. liwateritmll fitug., 2G., 33.912.

This device is a waterfire fines and against the heated plates of which the water from the base of the drum is discharged. The other eduction pipe j, which is of much larger capacity, leaves the supplementary drum c from the steam space above the water level and delivers both ste'aii'rand carried-ov i' water into the steam space of the primary boiler 7). Vent is thus found for the energetic ebullition and rapid steam generation effected in the supplementary drum while the water level is maintained in both drumand primary boiler. In this manner a quickened and controlled circulation is established' and maintained, so as 'automatically to adapt the whole combination of parts to the increased duty made possible.

I may, if I so please, establish in the larger or steam eduction pipe a pressure delivery valve (not shown) by which I may set up a differential action, and so utilize any given difference of pressure between the drum andthe primary boiler to enforce a diderential flow of waterzfrcm the base of the drum to the boiler-fines by the` first set of eduction pipes.

To facilitate the vcomplete removal ofall slag, clinker, ashes and ineombustible dust, the combustion chamber is open below and may discharge into a receiver as a at the base in many well-known ways to permit lof the refuse being carried easily away at convenient times.

Haytng thus described my invention what I claim as new and desire'to secure by Lgtters' Patent is 1. A combined cylindrical boiler, stage'i heater and water circulator for producing i :to the primary' boiler; a supplementary boiler mounted within and adjacent the top circulation in a manner parallel to the flow of the gases, consisting of a boiler as l), a combustion chamber as a, a stage heater and water eireulator c, eduetion pipes d, g andl y', all inA combination.

2. The combination of a primary boiler; a supplementary boiler; means for heating the waterin the supplementary boiler to a higher degree than the water in the primary boiler, the lowest portion of the water space of the primary boiler being below the lowest port-ion of the water space of the. suppleinentai y boiler; a feed water passage extending from the water space of the primary boiler to the supplementary boiler; and a return water passage extending from the water space of the supplementary boiler to the primary boiler.

3. The combination of a primary boiler; a supplementary boiler; means for heating the water in the supplementary boiler to a higher degree than the water in the primary boiler; a feed-water passage extending from the water space of the primary boiler to the supplementary boiler; a return water passage extending from the water space of the supplementary boiler to the primary boiler; and a passage extending from a point above the level of the water in the supplementary boiler to the primary boiler.

4. The combination of a primary boiler;

rounding ihe jet; a water-feed passage leady` ing from the primary boiler to the supple mentary boiler; a second water feed leading trom the water jacket to the suppleinentary boiler; a return water-feed passage,

leading from the supplementary boiler to the primary boiler; and a passage leading from the space above the water level in the supplementary boiler into the steam space of the primary boiler.

5. The` Combination of a primary boiler; a heating chamber having. a passage leading to the primary boiler; a supplementary boiler mounted within the chamber; a jetmounted within the chamber; means for directing fuel through the jet and towardihe supplementary boiler; a. Water jaeltet for the jet; a passage for conveying the vwater from the primary'boiler to the water jacket; a passage for conveying the water from the water jacket to the supplementary boiler; a return water passage from the supplemenl tary boiler Ato the primary boiler; and a passage leading from the supplementary boiler at a point above Vthe water level therein to the steam space of the primary boiler.

rlhc combination of a primary boiler; a heating chamber having a passage leading of the heating chamber; means adjacent the e lreturn water passage leading from the supplementary boiler to the primary boiler.

i. rl`he combination of a primary boiler;

,a heating chamber having a passage leading to the brimary boiler; a supplementary boiler mounted within `and adjacent the' top of the heatingichamber; means adjacent the base of the chamber for supplying-heat directly to the' supplementary boiler; a feedwater passage leading from the primary boiler to the supplementary boiler; a return water passage leading from the supplementary boiler to the primary boiler; and a passage leading from the supplementary boiler at a point above the water level to the steam space of the primary boiler.`

S. The combination of a primary boiler; a heating chamber having a passage leading to the primary boiler; a supplementary boiler mounted within and adjacent the top of the heating chamber; means Within the chamber for supplying heat to the supplementary boiler; a feed Water passage leading from the primary boiler to the supplementary boiler; and a return Water passage leading from the supplementary boiler to the primary boiler.

9. The combination of a primary boiler;

a heating chamber having a passage leadin to the primary boiler; a supplementary boiler mounted Within the heating chamber; a lfuel supplying jet mounted Within the heating chamber to direct the fuel toward the supplementary boiler; a Water jacket adjacent the said jet; a Water supply passage leading from the primary boiler to the Water jacket; a Water passage leading from the Water passage to the supplementary boiler; a return Water passage leading from the supplementary boiler to Athe primary boiler; and a passage leading from the supplementary boiler at a point above the Water level therein to the steam space of the primary boiler.

10. The combination of a primary boiler; a heating chamber having a passage leading from a point adjacent one end of the primary boiler, said passage having a curved detlecting surface; a supplementary boiler mounted within and adjacent the said end of the heating chamber; a fuel supplying jet for directing the fuel toward the said end of the heating chamber; a Water jacket adjacent to said jet; a Water supply pa.,- sage leading from the primary boiler to the Water jacket; a water passage leading from the Water jacket to the supplementary boiler; a return Water passage leading from the supplementary boiler to the primary boiler; and a passage leading from the supplementary boiler at a point above the Water level therein to the steam space of the primary boiler.

l1. The combination of a primary boiler; a heating rhamber having a passage leading from a point adjacent the top thereof to the primary boiler, said passage having a curved defleeting surface; a supplementary boiler mounted within and adjacent the top of the heating chamber; a fuel supplying jet for directing fuel toward the top of the heating chamber; a Water jacket adjacent to the jet; a plurality of feed Water passages leading from the primary boiler to the Water jacket; a plurality of water passages leading from the water jacket to the supplementary boiler; a plurality of return water passages leading from the supplementary boiler to the primary boiler; and a passage leading from the supplementary boiler at a point above the water level therein to the steam space of the primary boiler.

l2. The combination of a primary boiler; a heating chamber having a passage leading from a point adjacent the top thereof to the primary boiler; said passage having a curved deflecting surface; a supplementary boiler mounted Within and adjacent the top of the heating chamber; a fuel supplying jet for directing fuel toward the top of the heating chamber; a Water jacket adjacent to the jet; a feed water passage leading from the primary boiler to the Water jacket; a Water passage leading from the water jacket to the supplement-ary boiler; a return Water passage leading from the supplementary boiler tothe primary boiler; and a passage leading from the supplementary boiler at a point above the Water level therein to the steam space of the primary boiler.

13. The combination of a primary boiler; a heating chamber; a supplementary boiler mounted Within the heatingehamber, a heat supplying jet arranged to direct heat toward the supplementary boiler; a feed Water passage extending from the primary boiler to the supplementary boiler; and a return water passage extending from the supple-- mentary boiler to the primary boiler.

14. The combination of a primary boiler; a heating chamber; a supplementary boiler mounted within the heating chamber; a heat supplying jet arranged to direct heat toward the supplementary boiler; a feed water passage extending from the primary boiler to the supplementary boiler; a return water passage extending from the supplementary boiler to the primary boiler; and

a passage leading from the supplementary boiler at a point above the Water-.level therein tothe steam space of theprunary.

ln testimony whereof; l have signed my name to this specification, in the presence of two subscribing witnesses.

CHARLES AUGUSTUS lillDGLEY.

Witnesses:

THOMAS Pnnsco'rr; HAROLD WALKER. 

